I've updated my herd immunity tracker, the key changes are:

I've added a line at 70%, which seems to be the closest thing to a consensus estimate for the COVID-19 herd immunity threshold, though estimates range from 50 to 90%. We should also expect to see different thresholds in different states due to the "momentum" of the pandemic. A state that is getting more of its immunity from vaccinations and maintaining a low level of ambient infections should see immunity begin to kick in faster than a state where the pandemic is raging. The graph will also no longer rescale on state selection, making comparison easier.
I've changed the interpolation of vaccine data from a linear model to a more plausible simple exponential model which honestly just looks better on the graphs. A reminder that interpolation only occurs for the early dates before the CDC began releasing state by state vaccination data, so the most recent data is not modeled.
The chart should 🤞 now update daily, and will run a day or two behind the current date, aligning with the CDC's publishing schedule.
I've also included a table below the graph with my current estimates by state to make cross state comparisons and seeing the latest data easier.

State	Estimated % Infected	% Vaccinated	Estimated % Immune
United States	29.3%	17.7%	47.0%
Alaska	19.7%	24.7%	44.4%
Alabama	34.0%	14.5%	48.5%
Arkansas	37.6%	16.1%	53.8%
Arizona	38.1%	19.5%	57.7%
California	26.5%	18.3%	44.8%
Colorado	24.0%	18.2%	42.2%
Connecticut	27.1%	24.1%	51.3%
District of Columbia	21.0%	20.5%	41.5%
Delaware	28.9%	17.8%	46.7%
Florida	30.0%	17.6%	47.6%
Georgia	34.3%	13.4%	47.7%
Guam	23.4%	21.2%	44.6%
Hawaii	5.7%	19.1%	24.8%
Iowa	30.6%	19.9%	50.5%
Idaho	33.3%	16.4%	49.7%
Illinois	30.5%	18.4%	48.9%
Indiana	31.1%	16.8%	47.8%
Kansas	33.1%	16.7%	49.7%
Kentucky	30.1%	18.5%	48.6%
Louisiana	33.0%	16.2%	49.2%
Massachusetts	26.9%	21.4%	48.1%
Maryland	21.1%	17.5%	38.6%
Maine	9.4%	19.7%	29.1%
Michigan	23.7%	17.3%	41.0%
Minnesota	26.8%	19.8%	46.5%
Missouri	26.9%	16.9%	43.8%
Northern Mariana Islands	0.9%	21.0%	22.5%
Mississippi	39.5%	16.7%	56.2%
Montana	30.7%	20.2%	50.9%
North Carolina	26.7%	17.4%	44.1%
North Dakota	38.5%	23.1%	61.7%
Nebraska	33.8%	18.4%	52.3%
New Hampshire	17.0%	19.8%	36.8%
New Jersey	40.4%	19.0%	59.4%
New Mexico	27.3%	24.6%	51.9%
Nevada	32.6%	17.3%	49.8%
New York	35.7%	17.7%	53.4%
Ohio	27.5%	17.2%	44.7%
Oklahoma	36.3%	20.5%	56.7%
Oregon	10.7%	17.6%	28.3%
Pennsylvania	25.3%	17.7%	43.1%
Puerto Rico	14.2%	12.4%	26.6%
Rhode Island	34.5%	21.5%	56.0%
South Carolina	33.8%	16.3%	50.2%
South Dakota	48.3%	23.9%	72.1%
Tennessee	38.8%	15.4%	54.3%
Texas	33.4%	15.5%	48.9%
Utah	32.0%	15.1%	47.1%
Virginia	23.2%	18.2%	41.4%
Virgin Islands	7.9%	14.7%	22.6%
Vermont	6.7%	20.1%	26.8%
Washington	15.1%	17.9%	33.0%
Wisconsin	34.3%	19.4%	53.6%
West Virginia	21.1%	20.5%	41.6%
Wyoming	29.4%	19.3%	48.7%